Concrete CMS before 9.5.3 does not apply HTML entity encoding to user-defined Form block question labels when rendering them as column headers in the Dashboard Form Submissions report (concrete/single_pages/dashboard/reports/forms/legacy.php). a rogue editor could store markup or script in a label that then executes in the browser of any administrator who opens the submissions report for the affected form, producing stored cross-site scripting in the Dashboard. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 8.4 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori from Tenzai for reporting.
Metrics
Affected Vendors & Products
References
History
Tue, 22 Sep 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Fri, 18 Sep 2026 15:30:00 +0000
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| CPEs | cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:* | |
| Metrics |
cvssV3_1
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Tue, 15 Sep 2026 19:45:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Concretecms
Concretecms concrete Cms |
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| Vendors & Products |
Concretecms
Concretecms concrete Cms |
Tue, 15 Sep 2026 17:00:00 +0000
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| Description | Concrete CMS before 9.5.3 does not apply HTML entity encoding to user-defined Form block question labels when rendering them as column headers in the Dashboard Form Submissions report (concrete/single_pages/dashboard/reports/forms/legacy.php). a rogue editor could store markup or script in a label that then executes in the browser of any administrator who opens the submissions report for the affected form, producing stored cross-site scripting in the Dashboard. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 8.4 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori from Tenzai for reporting. | |
| Title | Concrete CMS below version 9.5.3 is vulnerable to Stored XSS in Concrete CMS Form Submissions Report via Unescaped Question Label | |
| Weaknesses | CWE-79 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: ConcreteCMS
Published: 2026-09-15T16:44:40.277Z
Updated: 2026-09-22T18:12:28.450Z
Reserved: 2026-08-27T18:18:39.737Z
Link: CVE-2026-81896
Updated: 2026-09-22T18:12:09.114Z
Status : Analyzed
Published: 2026-09-15T17:17:27.863
Modified: 2026-09-22T19:16:52.643
Link: CVE-2026-81896
No data.